Abrading and polishing tool



Jan, 13, 1925.

R. w. 'WILSBACH A BRADING AND POLISHING T005 Filed-90u14, 1920" Patented Jan. 13, 1925..

ROBERT W. WILSBCH, OF PHILADELPHIA, PENNSYLVANIA.

ABRADING AND rOLrsHInd TOOL.

Application filed October 14, 1920. Serial No. 416,868.

To (Li/l whom t ma-g/ concern.'

Bc it known thatl, ROBERT XV. VILsAori, a citizen ofthe United States, and resident of Philadelphia, county of Philadelphia and State of Pennsylvania, have invented an Improvement in Abrading and Polishing Tools, of which thc following is a specification.

' The object of my invention is to provide a suitable hand tool adapted for sand papering or polishing Wood and other materials by the employment of an endless abrading Or polishing bandv mechanically driven and adapted to be moved over the article to be smoothed or polished, and wherein a simple and inexpensive construction suitable for the purpose is embodied.

In putting my invention into practice, I

provide a hand frame having tWO rollers spaced apart `and journalled in the'frame and about which the endless abrading or polishing band is arranged, and in which, furthermore, an electric motor is provided within oneof the rollers and mechanically connected thereto for rotating it.

illy in ventionalso comprehends details of construction Which, together ivith the features above specified, are more fully described hereinafter and particularly pointed out in the claims.

Referring to thcdrawing z-P-Fig. 1 is a side elevation of my improved abrading and polishing tool; Fig. 2 is a plan viewof the same; Fig. isa transverse sectional View on line 3 3 of Fig. 1; and Fig. 4 is a vertical section on line 4-14 of Fig. 1, showing the hinged` side Wall and locking means therefor.

2 is a main frame, having'sat its upper part a handle 3 by which it may be moved. ITournalled Within this frame are tWo rollers 4 and 5 about Which an endless abrading or polishing band' 6 is provided. This band may be of sand paper oreemery cloth,lor Where a high polish is required, it may be of leather or other suitable buHing material according to the character of treated. The roller 4 is made hollow and of cylindrical shape and at one end is journalled at- 8 by ball bearings upon an in- Wardly extending bearing 7 vsecured to one of the side Walls of the frame 2, and the other end .of the cylinder or roller is journalled at 10 in a; bearing on the other side .downward beloivrthe frame 2,

Work to bel Wall ofnthe frame 2, the construction being such that the cylinder or roller extends as clearly indicated in Fig. 1. lVithin the hollow roller or cylinder 4 is arranged an electric motor 11 which is 'rigidly secured to the inwardly projecting bearing T and preferably so that its shaft 21 is arranged obliquely to the axis 0f the hollow roller or cylinder, and moreover carriesI upon its end a. bevel pinion 12 Which meshes with an internal gear 13 on the insideof the roller or cylinder 4, all 'as shown in Fig. il. 1n this manner, the electric motor may be permitted to run at a high Speed Witha very much lower speed to the roller or cylinder 4, so that the abrading or polishing band is not required to travel atk too high a speed. 4In place of the simA ple reduction gear here shown any other for'nrof reduction gear may be employed between the motor and the cylinder. and I, therefore, do not restrict myself to the particular means shown.

The inward projecting bearing T which supports the motor 11 fromthe side Wall of the frame 2 is made tubular at 14 and through this is extended Vthe electric cable 15 containing the positive and negative conductors for furnishing `electricity to thc electric motor. Any suitable rheostat or i switch in connection with the cable may be employed for controlling the run of the motor, as is `well known in operating electric motors.

To enable the endless band 6 to be kept i taut and to compensate forv any difference `in the lengths of the bands employed, the

roller 5 may be adjusted longitudinally upon the frame 2 and a suitable means for accom plishing this purpose consists of arranging` the `journals 1G of thc rollerin a slot` 19 in the side ,Walls of the frame 2 and having Said journals supported in hinged bearings 17 which are pivoted at 18 to the side Walls of the main frame 2, and adjusting these pivoted` Bearings by means of adjusting screws 2O carried by the main frame, which construction will be understood byreference to Fig. 1. To insure the abrading band being pressed overy a sufficient area upon the article being treated, a smooth pressure plate 22 is provided between the lonerportions of the two rollers 4 and 5 and carried by the main frame, so that when the main so that it vdoesnot performany abrading orJ turned over on its side".

frame and rollers yare pressed" downward,

this pressure plate 22 forces the intermediate portion of the band positively upon the surface being abraded or polished.

To enable the endless bands removed and replaced about the rollers i and 5, I make the side wall 2 of a separate piece from the rest ofthe main frame 2 and hinge it thereto along its upper edge at 23 and the lower end of this hinged side wall 2a engages the pressure plate 22 at 24 so as to support it when downward pressure is applied;

l/Vhen the side wall is in the position 'indif' cated in the drawing, it is heldinthat position by means of a vclamping screw 25. By

removing the clamping screw 25, the Side wall 2a may be swung upward and thereupon the endless band may be withdrawn and 'replaced. The side wall is then turned down into position receiving the journals 10 and 16 in their bearings and thereaftery thel clamping screw 25 is inserted to put the apparatus' in operative condition for use.

The hinged side -wall ofthe mainframe is also provided with two vertical foot pieces 26 which extend somewhat beyond the'bearings and other parts of the said side wallv and act as feet to support the'4 tool when This will enable the tool to be positioned while still running polishing work. It gives -to the operator capacity of putting the tool inA` or out of ac- -tion withouthaving to controlthe rheostat or switch for temporary interruptions of the abrading or polishing operations. While I prefer to place these feet 26 on the side of the main frame and preferably upon the' hinged side wall thereof', itis manifest thatA they may be arranged at the'end ofthe main frame or in either place about it. so long as they extend upward to support the tool when ,turned on' its side' or end and with the abrading or polishing ban'd restingclear ofthe surface of the article being treated. r

' It :wil-lnow'be apparent that I hav'cidevised a novel and useful construction which embodiesthe features' of advantage enumerated .-as'desirable, and while I have in the present instantie shown and, described the preferred4 embodiment thereof whichhas beenl foundcin practice to give lsatisfactory and reliable results, it is to be understoodthat I donot restrict myself to the details, as the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention.

to be readily 4ters;Patent, is

',..}1-. In an abrading and polishing tool, the

frame at a distance apart, an' endless band arranged about the two rollers and exposed below the rollers and main frame for operating upon' the-article, an electric ,motor Having now described'my invention, what l I-claim-as new and desire to secure by Lets combinationofa main frame having a handle portion, rollers journalled in the mainrigidly supportedwithin one of the rollersy and mechanically connected therewith to rotate it, aflexible conductor capable of sup- .plying electricity to the motor, and means for-putting the endless band under tension, and wherein further, the electric motor is arranged with its shaft obliquely to the axis of the roller, and the connecting means between the` motor shaft and profilerl consists of a. .pinion on the 'motorshaft and an internal y' gear on the roller. v

2. Invan abrading and polishing tool, the

combination 'of a -rnain frame\ having a hinged side wall, two rollers' journaled on 1 the main frame at one end and upon the" ing detachable devices between the sidewall and pressure plate. 3. A hand tool for abradjng or polish- Alng surfaces, comprising amain frame having a handle, rollers carried. thereby, an endless Xabradin .or polishing band arranged about the ro ers, electric motor means Vforv rotatin the'rollers and givin motion to the band, e ectric wires supporte at one side of the'main frame for supplying current to the electric motor,. jand supporting portions on the main frame at the side thereof vopposite to the electric wires adapted to` support the tool when out .of operative 'position and with t axes ofits .rollers in vertical Positions. r Intestimony of 'which invention, I hereunto set my'l hand. j

. ROBERT W. WILSBACH.

llO 

